You unlock your iPhone by either having it read your fingerprint or typing in a simple passcode. On Android, you unlock your device by drawing a pattern between a grid of dots.

But imagine being able to unlock your iPhone with art. Imagine painting a smiley face, or scrawling your signature, or heck, drawing a pornographic picture on your iPhone display and having it magically spring to life.

Sure, a simple passcode with four numbers will keep most casual folks out of your iPhone, but if you want it to be really secure, you should think about using an alphanumeric password, like you would on a website or your Mac.

The idea here is simple, the more characters you have (and the less obvious your password is), the better your security. Balancing a large enough number of characters with ease of recall can still be tricky, but I’d bet you’ve got it fairly worked out on the websites you visit — why not use that same acumen on your iOS devices?

Here’s how to turn off the simple passcode in iOS, and set up a more secure one.

We’ve already seen a whole bunch of iPhone 5S components over the past few months—they’ve even been shown off in hands-on videos—but these high quality images show the changes Apple has made to its Retina display when compared to the iPhone 5 model.

There are a number of tweaks for jailbroken iOS devices that add alternative security measures to your lock screen, but Piano Passcode is possibly one of the craziest. Rather than typing a code or drawing a pattern, you have to play it a tune on a set of virtual keys.

Did you know you could use Siri, Apple’s personal voice assistant, without unlocking your iPhone? Well, you can. Hold the Home button for the few seconds it takes for Siri’s purple microphone icon to show up, and you can ask it to do anything you like, like making a phone call, composing a Tweet, or sending an iMessage. This is a great feature for the person who owns the iPhone, but what about someone who finds your iPhone, or that one friend who can’t keep from messing with your stuff?

Luckily, you can turn this “feature” off, thereby preventing this from happening. Here’s how.